12 Types of Rattlesnakes in Arizona

12 types of rattlesnakes have a verified observation record in Arizona. The most frequently recorded are Western Diamond-backed Rattlesnake, Western Black-tailed Rattlesnake and Mojave Rattlesnake. Here is the full list, ranked by how often each is reported on iNaturalist.

Quick Answer

12 types of rattlesnakes have a verified observation record in Arizona. The most frequently recorded are Western Diamond-backed Rattlesnake, Western Black-tailed Rattlesnake and Mojave Rattlesnake. Here is the full list, ranked by how often each is reported on iNaturalist.

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Real sighting data, source iNaturalist

20,753 verified observations on iNaturalist of rattlesnake have been recorded in Arizona, most often in August, July, September.

When rattlesnake are recorded in Arizona

Verified species, source iNaturalist

12 types of rattlesnakes recorded in Arizona

12 rattlesnake species have a verified observation record in Arizona, each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.

  • No openly licensed photo yet
    1

    Western Diamond-backed Rattlesnake

    Crotalus atrox

    10,316 recordsNative
  • No openly licensed photo yet
    2

    Western Black-tailed Rattlesnake

    Crotalus molossus

    2,918 recordsNative
  • No openly licensed photo yet
    3

    Mojave Rattlesnake

    Crotalus scutulatus

    2,187 recordsNative
  • No openly licensed photo yet
    4

    Sidewinder

    Crotalus cerastes

    1,192 records
  • No openly licensed photo yet
    5

    Tiger Rattlesnake

    Crotalus tigris

    925 records
  • No openly licensed photo yet
    6

    Arizona Black Rattlesnake

    Crotalus cerberus

    730 records
  • No openly licensed photo yet
    7

    Rock Rattlesnake

    Crotalus lepidus

    712 recordsNative
  • No openly licensed photo yet
    8

    Southwestern Speckled Rattlesnake

    Crotalus pyrrhus

    706 records
  • No openly licensed photo yet
    9

    Ridge-nosed Rattlesnake

    Crotalus willardi

    325 records
  • No openly licensed photo yet
    10

    Prairie Rattlesnake

    Crotalus viridis

    255 records
  • No openly licensed photo yet
    11

    Western Rattlesnake

    Crotalus oreganus

    235 records
  • No openly licensed photo yet
    12

    Twin-spotted Rattlesnake

    Crotalus pricei

    199 recordsNative

Counts from verified iNaturalist observations.

The Western Diamond-backed Rattlesnake (Crotalus atrox) is the most commonly recorded, with 10,316 verified observations, about 50% of all rattlesnakes reported in Arizona. If you spot a rattlesnake here, it is statistically most likely to be this one.